Strain beam type two-dimensional borehole stress meter capable of measuring stress of protolith on inner wall of borehole

The invention relates to a strain beam type two-dimensional borehole stress meter capable of measuring the stress of primary rock on the inner wall of a borehole, and belongs to the technical field of measurement of the stress of the primary rock in the borehole. The borehole stressometer comprises a measuring part and a power part, the measuring part comprises two pairs of strain beams and a supporting mechanism, the two pairs of strain beams are slidably arranged on the supporting mechanism in a cross shape, the strain beams are used for bearing stress changes of the inner wall of a borehole, and the power part is connected to one end of the supporting mechanism of the measuring part. Power is provided to support the two pairs of strain beams along the radial direction of the support mechanism. The strain beam type two-dimensional borehole stressometer designed by the invention is high in measurement precision, good in stability and convenient to apply. 本发明涉及一种能够测量钻孔内壁原岩应力的应变梁式二维钻孔应力计，属于钻孔原岩应力测量技术领域。所述钻孔应力计